A5100651761- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Microwave Engineering and Waveguides
- Catalytic Processes in Materials Science
- Photonic and Optical Devices
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Advanced Polymer Synthesis and Characterization
- Synthetic Organic Chemistry Methods
- Electrochemical sensors and biosensors
- Layered Double Hydroxides Synthesis and Applications
- Enzyme Structure and Function
- Advanced Battery Technologies Research
- Cancer Research and Treatments
- Solid-state spectroscopy and crystallography
- Molecular Junctions and Nanostructures
- Topological Materials and Phenomena
- Advanced Photocatalysis Techniques
- Crystallization and Solubility Studies
Beijing University of Chemical Technology
2019-2025
Taiyuan University of Science and Technology
2025
Anyang Normal University
2025
LinkedIn (United States)
2024
Princeton University
2017-2023
Yanshan University
2023
China University of Petroleum, Beijing
2015-2023
Institute of Applied Physics and Computational Mathematics
2023
North China Electric Power University
2023
Yantai University
2023
We demonstrate a method for controlled p-doping of the halide perovskite surface using molecular dopants, resulting in reduced non-radiative recombination losses and improved device performance.
Abstract Halide perovskites are currently one of the most heavily researched emerging photovoltaic materials. Despite achieving remarkable power conversion efficiencies, perovskite solar cells have not yet achieved their full potential, with interfaces between and charge‐selective layers being where recombination losses occur. In this study, a fluorinated ionic liquid (IL) is employed to modify perovskite/SnO 2 interface. Using Kelvin probe photoelectron spectroscopy measurements, it shown...
Abstract 2,2′‐(perfluoronaphthalene‐2,6‐diylidene)dimalononitrile (F6‐TCNNQ) is investigated as a molecular p‐type dopant in two hole‐transport materials, 2,2′,7,7′‐tetrakis( N , ‐diphenylamino)‐9,9‐spirobifluorene (Spiro‐TAD) and tris(4‐carbazoyl‐9‐ylphenyl)amine (TCTA). The electron affinity of F6‐TCNNQ determined to be 5.60 eV, one the strongest organic oxidizing agents used date electronics. p‐Doping found effective Spiro‐TAD (ionization energy = 5.46 eV) but not TCTA 5.85 eV). Optical...
Abstract In this essay, a case study is presented on the electronic structure of several metal halide perovskites (MHP) using Kelvin probe (KP)‐based surface photovoltage (SPV) measurements and ultraviolet photoemission spectroscopy (UPS) to demonstrate advantages, but also pitfalls, these techniques characterize surfaces materials. The first part addresses loss species from perovskite upon supragap illumination in vacuum. This has potential cause both long‐term alteration sample work...
Existing lightweight road sign detection methods can hardly address the challenges of occlusion and scale difference. Therefore, a Faster-YOLOv8n based method is proposed in this paper for intelligent unmanned vehicles. Firstly, we introduce Partial Convolution (PConv) into traditional YOLOv8n. The bottleneck C2F module replaced by FasterBlock, which reduces number parameters model improves speed. To reduce accuracy loss due to lightweighting differences near far views, Multi-scale Feature...
The controlled cationic copolymerizations of isobutylene (IB) with alkenyl styrenes including 4-allylstyrene, p -(3-butenyl)-styrene and -(5-hexenyl)-styrene were carried out in n -hexane/CH 2 Cl (6/4 v/v) at −80 °C using a t -BuCl/FeCl 3 /iPrOH initiating system.
Herein, we report a novel method for synthesizing 2,3‐allenols through copper‐catalyzed 1,4‐hydroxycyanation of 1,3‐enynes. Various convenient and easy‐to‐access 1,3‐enynes were suitable reaction substrates. Notably, the was regioselective under mild conditions in presence cheap, abundant, nontoxic CuCl2·2H2O. We propose mechanism involving radical pathway.
A novel Pd/NBE-catalyzed intermolecular dehydrobicyclization of heteroaryl iodides for the synthesis polycyclic nitrogen-containing heterocycles is reported. In this work, N-protected aryl carbamoyl chloride serves as a source of...
Understanding the stability of metal halide perovskite (MHP) surfaces is considerable interest for development devices based on these materials. We present here a vacuum-based study surface potential and response to illumination two different types films, methylammonium lead bromide (MAPbBr3) 2D Ruddlesden-Popper phase butylammonium iodide (BA2PbI4, n = 1), using Kelvin probe-based contact difference photovoltage measurements. show that supraband gap light irradiation can induce loss...
Understanding the origin and distribution of electronic gap states in metal halide perovskite (MHP) thin films is crucial to further improvement efficiency long-term stability MHP-based optoelectronic devices. In this work, impact Lewis-basic additives introduced precursor solution on density bandgap investigated. Ultraviolet photoemission spectroscopy contact potential difference measurements are conducted MHP processed from dimethylformamide (DMF)-based solutions which either no additive,...
Sensing stressful conditions and adjusting the cellular metabolism to adapt environment are essential activities for bacteria survive in variable situations. Here, we describe a stress-related protein, YdiU, characterize YdiU as an enzyme that catalyzes covalent attachment of uridine-5′-monophosphate protein tyrosine/histidine residue, unusual modification defined UMPylation. Mn2+ serves co-factor YdiU-mediated UTP binding converts aggregate-prone state facilitating recruitment chaperones....
Surface doping of graphene with redox-active molecules is an effective approach to tune its electrical properties, in particular for application as transparent electrodes. Here we present a study and surface n-doping the molecular reductant (pentamethylcyclopentadienyl)(1,3,5-trimethylbenzene)ruthenium dimer ([RuCp*Mes]2). Photoemission spectroscopy carrier-transport measurements are combined investigate doping-induced changes electronic structure interface between...
A simple, accurate and sensitive ionic liquid-based headspace single-drop microextraction procedure followed by high-performance liquid chromatography was developed validated for the determination of camphor trans-anethole in compound liquorice tablets. The volume microdrop increased to 12 µL modifying device suspended drop. stability sensitivity method were improved. Under optimum experimental conditions, calculated calibration curves gave acceptable linearity with correlation coefficients...
Electrochemical doping is a promising strategy to dope halide perovskites without introducing impurities into the lattice. However, n-type of remains challenging due intrinsically limited electrochemical stability. Herein, we report electrochemically n-doped CsPbBr3 nanocrystal (NC) films within stable potential windows (−0.9–0.5 V vs Ag/AgNO3). Compared bulk with accessible surface area for cation charge compensation, NC show more efficient n-doping properties their porous nature....
While it has recently been recognized that organic donor-acceptor charge transfer (CT) state energies can vary substantially under different interfacial morphologies, this behavior is under-appreciated in the context of singlet fission solar cells where a specific alignment between triplet material and CT interface necessary to function device. In work, we demonstrate energy prototypical pentacene-C60 system around 1 eV most systems, but over 300 meV depending on composition morphology...
In the standard configurations of metal halide perovskite solar cell, active layer, or absorber, follows a p-i-n n-i-p electronic structure that is designed to enhance separation and extraction photo-induced charge carriers. The control Fermi level position across film, between electron hole transport layers, therefore paramount importance. Direct localized doping in perovskites being still elusive, design structures has so far relied predominantly on surface interface as well work function...